<template>
    <div class="xtx-numbox">
        <div class="label">{{label}}</div>
        <div class="numbox">
            <a @click=" changeValue(-1)" href="javascript:;">-</a>
            <input type="text" :value="modelValue" readonly>
            <a @click="changeValue(1)" href="javascript:;">+</a>
        </div>
    </div>
</template>
<script>
import {ref} from 'vue'
import { useVModel } from '@vueuse/core'
export default {
    name: 'XtxNumbox',
    props: {
        label:{
            type:String,
            default:''
        },
        modelValue: {
            type: Number,
            default: 1
        },
        max:{
            type:Number,
            default:100
        },
        min:{
            type:Number,
            default:1
        }
    },
    setup(props, { emit }) {
        // const modelValue = ref(props.modelValue)
        // const changValue = (step) => {
        //     const newVal = modelValue.value + step
        //     if (newVal < 1 || newVal > 5) return
        //     modelValue.value = newVal
        //     emit('update:modelValue', modelValue)
        // }
        const currNum = useVModel(props,'modelValue',emit)
        const changeValue = (step) => {
            const newVal = currNum.value + step
            if(newVal < props.min || newVal > props.max)  return
            currNum.value = newVal
            //向外暴露change事件
            emit('change',newVal)
        }   

        return {
            changeValue
        }
    }

}
</script>
<style scoped lang="less">
.xtx-numbox {
    display: flex;
    align-items: center;

    .label {
        width: 60px;
        color: #999;
        padding-left: 10px;
    }

    .numbox {
        width: 120px;
        height: 30px;
        border: 1px solid #e4e4e4;
        display: flex;

        >a {
            width: 29px;
            line-height: 28px;
            text-align: center;
            background: #f8f8f8;
            font-size: 16px;
            color: #666;

            &:first-of-type {
                border-right: 1px solid #e4e4e4;
            }

            &:last-of-type {
                border-left: 1px solid #e4e4e4;
            }
        }

        >input {
            width: 60px;
            padding: 0 5px;
            text-align: center;
            color: #666;
        }
    }
}
</style>